As we begin to have landings on the moon, we can alternate those with vertical launch of similar crew modules on similar launch vehicles for vertical-launch tourism in space, if you want to call it that... adventure travel.

Straddling the top of the world, one foot in China and the other in Nepal, I cleared the ice from my oxygen mask, hunched a shoulder against the wind, and stared absently down at the vastness of Tibet.

There are people who travel because they want to push themselves to physical limits, people who walk across deserts or cycle across the Antarctic - like Ranulph Fiennes, who just does it because it's there. And then there are people like me, who are just genuinely curious about the world.

Adventure is something out of the usual pattern, a point at which you cannot avoid confronting the unknown, so that you have to dig inside yourself to find the courage and resources to deal with what may lie ahead, and to succeed.

He put his foot on one pedal, scooted a few yards and swung his other leg over the saddle. He soared left into the vertiginously sloping hillside road and sped, without touching his brakes ... The hedgerows and sky blurred; he imagined himself in a velodrome as the wind whipped his hair clean...

True adventure begins when everything goes wrong.